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https://issues.apache.org/jira/browse/CALCITE-3163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16877531#comment-16877531
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Ralph Gasser commented on CALCITE-3163:
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I've created a patch that should resolve the issue.
> Mapping of Types in AbstractCursor#convertValue() does not adhere to JDBC
> specifications
> ----------------------------------------------------------------------------------------
>
> Key: CALCITE-3163
> URL: https://issues.apache.org/jira/browse/CALCITE-3163
> Project: Calcite
> Issue Type: Bug
> Components: avatica
> Affects Versions: avatica-1.15.0
> Reporter: Ralph Gasser
> Priority: Major
> Attachments: patch0001.diff
>
>
> This is an issue I found while working on CALCITE-3162: According to my
> understanding, the method _AbstractCursor#convertValue()_, used for
> converting the component types of ARRAYs, does not adhere to what is
> specified in the [JDBC specification (Appendix
> B)|https://download.oracle.com/otn-pub/jcp/jdbc-4_1-mrel-spec/jdbc4.1-fr-spec.pdf?AuthParam=1561978725_eefb6fb1703d96f182674508c44126ea]
> regarding mapping of types:
> * The JDBC types FLOAT (6) and DOUBLE (8) should actually both map to Java
> _double_ or _Double_ respectively. Currently, FLOAT (6) is converted to a
> _float_.
> * The implementation is currently missing support for JDBC type REAL (7),
> which should convert to _float_ or _Float_ respectively
> This issue will cause an IllegalStateException to be thrown in clients using
> the Avatica Driver if they encounter REAL datatype in arrays.
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